car starts and stalls after alittle bit

[wevo1985]

ok, i just recently purchased galant vr4 number 61/1000 with no motor, trans, tcase. i put one in that i took from my eclipse. the motor is all new with about 1000 mile on it and ran great in the other car.i used all the same sensors. it has dks 272 cams and big t28 and evo8 mas. i put all that into the galant and it starts but stalls out after about 3 sec. ive jumped the fuel pump and can hear it on and still have the problem. check just about everything and fixed alot of harness and still the same. boost leak tested and found no leaks. unplugged the mas and the car runs perfect but rich. i also knoticed a miss when the mas is plugged in while driving. i was wondering if anyone else has had this problem, and what they found. i checked the harness to the mas and couldnt see anything wrong. is their something with that mas swap and the ecu i didnt know about?

im going to try new gas this week as well because i dont know how old it is and saw it has a dran plug so it would be easy to get that stuff out.

any help will be great, thank you

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[95DSMawd024]

Are you using the MAS from the Galant or the Eclipse?

 

[Rob88]

can u keep it running if u tap the throttle occasionally? or does it just die out all together no matter what u do?